I did have the same moving ballast in all the baits, up 1/4" above the line tie to rear hook hanger line, and 1/4" behind a line drawn perpendicular to that line up from the 3 gram belly hanger/weight combination.
My next prototype would have been with no moving ballast, and a 4 gram belly weight, repeating the longer bill experiment, if these hadn't succeeded. Fortunately, I don't have to go to through that exercise. While I enjoy making baits, I'd much rather find one that works, and just duplicate that one. I am lazy!